In a wide-ranging Bloomberg Business interview with Melinda Gates about the work of the Gates Foundation, including its $80 million commitment to using big data to improve gender equality, she addresses the lack of data about women, particularly in Africa. She gives an example about a triennial survey across the continent in which Ugandans, who surveyed about bringing income into the household. They found that when they included women, the responses added $700 million to the country’s economy. Simply put, Gates said, “What we don’t measure, we don’t work on.” Gates also talks about the US STEM “leaky pipeline,” again pointing out that without data, we can’t analyze and correct what has made the percent of computer science degrees earned by women to drop from 37% in the 1980’s to 18% today.